NH3: Problem with Puzzle 6

An error in Puzzle 6 caused problems for a few solvers. I understand and agree with suggestions that I should have test solvers. However, the idea of having someone to not be eligible for prizes irks me.

So what I do the last couple of years is this: I launch an event. And then I stay in front of the computer screen for a few hours until several entries start trickling in. The early solvers essentially act as test solvers and, even better, they can still win prizes. What happened last night was that Nikoli Hurdles 3 started and a moment later, I received a handful of submissions.

Thinking nothing went wrong, I went to bed and then to class. Now I realize (from a lot of emails) that Puzzle 6 indeed had multiple solutions, it is fixed now. I hope this does not distract you too much and I will try even more to get rid of these errors in the future.

Nikoli Hurdles 5 [Live Updates]

[01 Dec] Nikoli Hurdles 5 has started!
Any updates or errata will be mentioned here.

– Password for Puzzle 4 had a minor typo. It is now fixed. Sorry!

[02 Dec] Puzzle 8 has been updated. The original one had multiple solutions. Please reload the page for the new version.

Welcome!

What do crosswords in your newspaper, that numbered 9x9 grid that’s suddenly everywhere, the spot the differences on a cereal box, a chess position from some tournament match, the squiggles you see in common IQ tests and a high school mathematics exam have in common?

Answer: They can all be classified as a “puzzle”.
As a lifelong puzzler, I always find the word “puzzle” to be a bit broad. Everyone has their own definition of a puzzle. I imagine a certain place where all puzzle types gather and made known to everyone. That place would be Somewhere Over the Rainbow.